The .458 Socom upper will fit on any lower that takes .223R, 5.56, etc.
Standard .223 magazines will work without modification although insyructions included with my rifle it is RECOMMENDED a slight bevel is filed on the magazine.
I used standard unmodified (and MagPul) magazines for years without any problems.
T.
Last edited by TimW77; January 26, 2013 at 08:18 PM.
|